X ray studies of the Hyades cluster

Details X ray studies of the Hyades cluster X ray studies of the Hyades cluster

Oct 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993lock.repts....s&link_type=abstract

Final Report Lockheed Aircraft Corp., Palo Alto, CA. Research Lab.

Astronomy and Astrophysics

Astronomy

Sky Surveys (Astronomy), Star Clusters, X Ray Astronomy, Position (Location), Rosat Mission

Scientific paper

The Hyades cluster occupies a unique position in both the history of astronomy and at the frontiers of contemporary astronomical research. At a distance of only 45 pc, the Hyades is the nearest star cluster in the Galaxy which is localized in the sky: the UMa cluster, which is closer, but much sparser, essentially surrounds the Solar neighborhood. The Hyades is the prototype cluster for distance determination using the 'moving-cluster' method, and thus serves to define the zero-age main sequence from which the cosmic distance scale is essentially bootstrapped. The Hyades age (0.6-0.7 Gyr), nearly 8 times younger than the Sun, guarantees the Hyades critical importance to studies of stellar evolution. The results of a complete survey of the Hyades cluster using the ROSAT All Sky Survey (RASS) are reported.

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